Google 2FA: better info for user

Google sends SMS with code in format "G-XXXXXX".
User should enter only numbers wihout "G-".

+ added "G-" label which is shown in the Google
  authentication code request before PIN field

Change-Id: I8eaecbbe7b8803269444f947e97ee67c33db61b2
diff --git a/uui/source/authfallbackdlg.cxx b/uui/source/authfallbackdlg.cxx
index a6383d1..db0448e 100644
--- a/uui/source/authfallbackdlg.cxx
+++ b/uui/source/authfallbackdlg.cxx
@@ -23,6 +23,7 @@ AuthFallbackDlg::AuthFallbackDlg(Window* pParent, const OUString& instructions,
    get( m_pEDCode, "code" );
    get( m_pBTOk, "ok" );
    get( m_pBTCancel, "cancel" );
    get( m_pFTGooglePrefixLabel, "google_prefix_label" );

    m_pBTOk->SetClickHdl( LINK( this, AuthFallbackDlg, OKHdl) );
    m_pBTCancel->SetClickHdl( LINK( this, AuthFallbackDlg, CancelHdl) );
@@ -30,9 +31,17 @@ AuthFallbackDlg::AuthFallbackDlg(Window* pParent, const OUString& instructions,

    m_pTVInstructions->SetText( instructions );
    if( url.isEmpty() )
    {
        // Google 2FA
        m_pFTGooglePrefixLabel->Show();
        m_pEDUrl->Hide();
    }
    else
    {
        // OneDrive
        m_pFTGooglePrefixLabel->Hide();
        m_pEDUrl->SetText( url );
    }
}

AuthFallbackDlg::~AuthFallbackDlg()
diff --git a/uui/source/authfallbackdlg.hxx b/uui/source/authfallbackdlg.hxx
index b90bb15..9e5eb52 100644
--- a/uui/source/authfallbackdlg.hxx
+++ b/uui/source/authfallbackdlg.hxx
@@ -14,6 +14,7 @@
#include <vcl/dialog.hxx>
#include <vcl/edit.hxx>
#include <vcl/vclmedit.hxx>
#include <vcl/fixed.hxx>


class AuthFallbackDlg : public ModalDialog
@@ -24,6 +25,7 @@ private:
    VclPtr<Edit> m_pEDCode;
    VclPtr<PushButton> m_pBTOk;
    VclPtr<PushButton> m_pBTCancel;
    VclPtr<FixedText> m_pFTGooglePrefixLabel;

public:
    AuthFallbackDlg(Window* pParent, const OUString& instructions,
diff --git a/uui/uiconfig/ui/authfallback.ui b/uui/uiconfig/ui/authfallback.ui
index 6c99edf..dbeb5b5 100644
--- a/uui/uiconfig/ui/authfallback.ui
+++ b/uui/uiconfig/ui/authfallback.ui
@@ -92,10 +92,32 @@
              </packing>
            </child>
            <child>
              <object class="GtkEntry" id="code">
              <object class="GtkBox" id="box1">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="invisible_char">●</property>
                <child>
                  <object class="GtkLabel" id="google_prefix_label">
                    <property name="can_focus">False</property>
                    <property name="label" translatable="yes">G-</property>
                  </object>
                  <packing>
                    <property name="expand">False</property>
                    <property name="fill">True</property>
                    <property name="position">0</property>
                  </packing>
                </child>
                <child>
                  <object class="GtkEntry" id="code">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <property name="invisible_char">●</property>
                  </object>
                  <packing>
                    <property name="expand">False</property>
                    <property name="fill">True</property>
                    <property name="position">1</property>
                  </packing>
                </child>
              </object>
              <packing>
                <property name="expand">False</property>